INSECT PESTS AND THEIR CONTROL 257 



Fall Abmt Worm 

 {Laphygma frugiperda). 1 



A — Moth, plain gray form. B — Fore a P a rt 

 wing of prodenia-like form. C — Larva 

 extended. D — Abdominal segment of 

 larva, lateral viewj twice natural size. 

 E — Pupa, lateral view. 



The Cotton Red Spider (Tetran- 

 ychus bimaculatus, Harvey). — This 

 small red mite is common on cot- 

 ton and on several other plants, es- 

 pecially pokeweed and violet. It 

 causes the leaves of cotton to turn 

 red and fall off. It kills plants if 

 abundant. 



Treatment. — Prevent the mites 

 from starting on the cotton by clean 

 culture, being sure to eradicate all 

 pokeweed and violets near the fields. 

 If found in cotton fields, spray the 

 affected plants with potassium sul- 

 phide 3 pounds and water 100 gallons; 

 make two applications one week 



Bur. Ent. Cir. 172. 



The Fall Army Worm (Laphygma 

 frugiperda, S. and A.). — In general 

 appearance is similar to the common 

 army worm, but with different markings. It has wide range of food 

 plants, including many 

 forage and truck crops. 



Treatment. — Prac- 

 tice fall plowing to break 

 up the pupae cells in the 

 ground. Scatter poison 

 bran mash when the cat- 

 erpillars appear, or spray 

 or dust with arsenicals. 

 Bur. Ent. Bull. 29. 



The Green Bug, or 

 Spring Grain Aphis (Tox- 

 opteragraminum, Rond.). 

 — A small green plant 

 louse which attacks oats, 

 wheat, barley and other 

 grains. It appears very 

 early in the spring. 



Treatment. — No sat- 

 isfactory method of con- 

 trol is known. Attacks 

 may be partially pre- 



iBai. Ent, Boll. 20. * Turn. Ball. 840 



Hessian Fly (Mayetiola destructor). 3 

 Adult female, much enlarged. 



